GIS-BASED CONSTRUCTION GROUND LEVEL MANAGEMENT IN URBAN PLANNING: A CASE STUDY IN HANOI, VIETNAM

The management of construction ground levels must be carried out synchronously within a unified coordinate system across all sectors to ensure effective implementation and to minimize the risk of flooding across entire regions.In Vietnam, construction ground-level data in urban planning projects are typically managed by various agencies using different formats.This fragmentation causes significant difficulties in updating, adjusting, and sharing data across agencies.This study proposes the application of Geographic Information Systems (GIS) in developing a construction ground-level database in the Hanoi Software Technology Park Urban Area Project in Phuc Loi ward, Long Bien district -an innercity district of Hanoi.The input data were gathered from the officially approved planning drawing files at a scale of 1:500, dated 2013, and stored in *.dwg format of AutoCad software, including: topographic map; current land use map; detail planning map; technical infrastructure system drawing; communication system layout; and power supply system.A synchronous construction ground-level database was developed within the GIS environment, serving both management and decision-making functions.Moreover, this database is proposed to be publicly and transparently shared among inter-sectoral agencies and local communities, ensuring data accuracy and supporting digital transformation in the management of construction ground levels in particular and urban planning management in general.By visualizing and providing construction ground-level elevation, this result also enables identifying low-lying, flood-prone areas, and analyzing the impact of floods on infrastructure, thereby contributing to more effective flood risk reduction.